I'm talking about a fresh out of the box unit, using the battery that came with it. It was a direct side by side trial, the G7 would not range a hillside 600 yards away, though it would range the gong at 645. The Zeiss was and always has ranged hillsides with no problems, out to 1500 meters. Next weekend I will get a better opportunity to spend more time with it, and come back with the results.

Well I spent some more time with the unit, and watched all the vidoes from G7 about how to set it up. It's actually fairly simple to get everything set up and working and I found that the problem I was having was with how long to hold the fire button down.
I was abl to get ranges up to 1900 yards, but no further.
It worked ok, but I still feel like there is something amiss. It is very slow to acquire, the longer distances needing maybe 5 seconds of holding down the button while remaining perfectly on target. My Zeiss on the hother hand is instant and accurate, regardles of the surface you aim at.
This is a little more finciky, though the ballistics info is good and accurate.

I have yet to test it past 700 yards, but it does correspond to my field data.